This is _not_ my wheelhouse, but my compiler still works. 
Grab the mips oor binary (compiled from latest git) and example configuration file from here
After making sure your router is set up to properly download Debian wheezy-mips packages, copy the oor binary to /tmp on your router, then execute the following:
sudo bash
apt-get install libconfuse0 libzmq3 libxml2 mkdir -p /usr/local/sbin cp /tmp/oor /usr/local/sbin setcap cap_net_raw,cap_net_admin+ep /usr/local/sbin/oor
After that, follow the configuration instructions at https://github.com/OpenOverlayRouter/oor/blob/master/README.md#running-open-overlay-router
Would love to hear feedback, as I've no means of effectively testing this.
Rodney